Method of preparing architectural and engineering drawings

Abstract

Abstract INVENTION INCLUDES THE STEPS OF MANUALLY PREPARING A MASTER COPY CONTAINING INFORMATIVE MATTER SUPPLEMENTAL TO A MASTER DRAWING, TRANSFERRING SAME BY ELECTROSTATIC OR XEROGRAPHIC PROCESS WITH EITHER VAPOR OR HEAT FUSION OF A POWDERED INK IMAGE OF THE MASTER COPY TO THE PLASTIC FILM, AND APPLYING THE FILM SHEET BY MEANS OF ITS ADHESIVE BACKING TO THE MASTER DRAWING. A MASTER DRAWING, ARCHITECTURAL OR ENGINEERING, TO WHICH IS ADHESIVELY ATTACHED A TRANSPARENT PLASTIC FILM SHEET HAVING AN ACETATE OR POLYESTER BASE ONTO WHICH INFORMATIVE MATTER SUPPLEMENTAL TO THE SUBJECT OF THE MASTER DRAWING HAS BEEN TRANSFERRED FROM A MANUALLY DRAFTED AND TYPED MASTER COPY BY AN ELECTROSTATIC OR XEROGRAPHIC TYPE PROCESS. THE FILM SHEET HAS A PRESSURE SENSITIVE BACKING PROTECTED BY A WAX TYPE PAPER SHEET. AFTER REMOVAL OF THE PROTECTIVE SHEET, THE FILM SHEET IS APPLIED BY PRESSURE TO THE MASTER DRAWING AND APPEARS AS AN INTEGRAL PRT THEREOF, WITH THE TRANSFERRED MATTER IN CLEAN SHARP LINES AND LETTERS WHICH DO NOT BECOME SEMARY WHEN HANDED IN USE. THE PROCESS OF PREPARING DRAWINGS EMBODYING MY

Inventors

• 👤 R Clay

Bibliographic Details